Dimethylformamide → 2-Chloro-8-(6-fluoro-pyridin-3-yl)-4-morpholin-4-yl-quinazoline

HRID 2092555Notes

Reaction equation

HRID 2092555 reaction equation
Br[C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:11]=1[N:10]=[C:9]([Cl:12])[N:8]=[C:7]2[N:13]1[CH2:18][CH2:17][O:16][CH2:15][CH2:14]1.[F:19][C:20]1[CH:25]=[CH:24][C:23](B(O)O)=[CH:22][N:21]=1.C(=O)([O-])[O-].[Na+].[Na+].CN(C=O)C>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.O>[Cl:12][C:9]1[N:8]=[C:7]([N:13]2[CH2:18][CH2:17][O:16][CH2:15][CH2:14]2)[C:6]2[C:11](=[C:2]([C:23]3[CH:22]=[N:21][C:20]([F:19])=[CH:25][CH:24]=3)[CH:3]=[CH:4][CH:5]=2)[N:10]=1

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 10340Sodium CarbonateHCID 2783397(6-Fluoropyridin-3-yl)boronic acidHCID 866657654-(8-Bromo-2-chloroquinazolin-4-yl)morpholine

Product 1

HCID 866657672-Chloro-8-(6-fluoro-pyridin-3-yl)-4-morpholin-4-yl-quinazolineYield 63.7%

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 962WaterSolvent

Conditions

Temperature
95 °C

Procedure

To a 50 mL round bottom flask, 8-bromo-2-chloro-4-morpholin-4-yl-quinazoline (150 mg, 0.00046 mol), 2-fluoropyridine-5-boronic acid (58 mg, 0.00041 mol), sodium carbonate (72 mg, 0.00068 mol), DMF (10 mL) and water (3 mL) were added and the reaction vessel was degassed with nitrogen for 5-10 min. To the same reaction mixture, PdCl2(PPh3)2 (16 mg, 0.000023 mol) was added and again degassed with nitrogen for 5-10 min. The reaction mixture was stirred at 95° C. for 2 h. The reaction mixture was cooled and diluted with ethyl acetate. The organic layer was washed with water, brine and dried over sodium sulfate. The solvent was removed under reduced pressure to afford the crude product. The crude product was purified using column chromatography (60-120 silica gel, 60% ethyl acetate in hexane) to yield the desired product [90 mg, 60%]. 1H NMR (300 MHz, CDCl3): δ 8.44 (s, 1H), 8.17-8.24 (m, 1H), 7.89 (d, J=8.1 Hz, 1H), 7.78 (d, J=7.5 Hz, 1H), 7.53 (t, J=7.5 Hz, 1H), 7.75 (dd, J′=2.7, J″=3.0 Hz, 1H), 3.89 (s, 8H). LC-MS (ESI): Calculated mass: 344.1; Observed mass: 345.0 [M+H]+ (RT: 1.63 min).

Workup

  1. customthe reaction vessel was degassed with nitrogen for 5-10 min
  2. customagain degassed with nitrogen for 5-10 min
  3. temperatureThe reaction mixture was cooled
  4. additiondiluted with ethyl acetate
  5. washThe organic layer was washed with water, brine
  6. dry with materialdried over sodium sulfate
  7. customThe solvent was removed under reduced pressure
  8. customto afford the crude product
  9. customThe crude product was purified

Sources & evidence

ORD record
ord-eed8ef1fdb3c4608a3fe861f77030f8a
Source dataset
uspto-grants-2013_05
Patent number
US08440662B2

Reaction notes

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